Continuously variable transmission for vehicle

A continuously variable transmission for a vehicle, comprising:

• a continuously variable transmission mechanism to which a driving force from a driving source provided in the vehicle is input;
• and
• a planetary gear mechanism including a plurality of rotation elements, the plurality of rotation elements being a sun gear, a ring gear, or a carrier,
• wherein the continuously variable transmission is capable of operating in a predetermined operation mode,
• in the predetermined operation mode,
• the driving force is input to a first rotation element out of said plurality of rotation elements through said continuously variable transmission mechanism,
• the driving force is input to a second rotation element out of said plurality of rotation elements without an intervention of said continuously variable transmission mechanism, and
• the driving force is output through a third rotation element out of said plurality of rotation elements,
• said continuously variable transmission mechanism further comprises:
• a target driving force calculation unit configured to calculate a target driving force of the vehicle based on an accelerator opening;
• a running resistance calculation unit configured to calculate a running resistance of the vehicle;
• a rotation speed detection unit configured to detect a rotation speed of a rotation member provided in the vehicle;
• a vehicle speed specifying unit configured to specify a vehicle speed based on a detection result of said rotation speed detection unit;
• and
• a setting unit configured to set a target speed ratio of said continuously variable transmission mechanism based on the vehicle speed specified by said vehicle speed specifying unit and a target rotation speed of the driving source, and
• said vehicle speed specifying unit
• specifies the vehicle speed from the detection result when the detection result of said rotation speed detection unit exceeds a threshold, and
• specifies the vehicle speed based on the target driving force calculated by said target driving force calculation unit, the running resistance calculated by said running resistance calculation unit, and a weight of the vehicle when the detection result of said rotation speed detection unit is not more than the threshold.